Page Comparison

...

• Motor controller capacitors are currently charged with a constant voltage source and series resistor. This is always 50% efficient. For a challenger vehicle, it might be better to have a switching circuit (buck topology) to charge with constant current (which would also be faster).

• Keep to 12V by removing DC DC inversion

• Add hall effect sensor

• Make simpler by removing irrelevant portions (e.g. fan control and thermistor may have been exclusive to MOV since shorts less of an issue?)

Research Summary

Switching Circuit [Not Choosing This. Prefer Hall Effect Current Sensor]

https://www.powerelectronicsnews.com/power-supply-design-tutorial-part-1-2-topologies-and-fundamentals-continued/https://www.maximintegrated.com/en/design/technical-documents/tutorials/2/2031.html

• Remove DC-DC [Using different change]

  • Remove all isolated 12V connection

  • Replace with VBAT

• Replace HV FET with solid-state relays [May not implement. No big advantages for changes]

  Q1 and Q2 system to be entirely replaced with solid-state relays

• End changes

  • One end from HV_IN

  • Other end to pre-charge

    • iso_latch_out might be removed?

Links

https://electronics.stackexchange.com/questions/261711/how-can-i-replace-a-relay-with-a-mosfet-transistor

• Reverse it?

• Part Search

  • Need 150V

  • https://www.digikey.ca/en/products/detail/bright-toward-industrial-co-ltd/AA58F/14302559

    • 1700V?

    • 120mA

  • https://www.digikey.ca/en/products/detail/panasonic-electric-works/AQY414SX/512420

    • 400V

    • 100mA

  • https://www.digikey.ca/en/products/detail/panasonic-electric-works/AQW210EHAX/512337

    • 350V

    • 120mA

    • Preferring This One

  • https://www.digikey.ca/en/products/detail/panasonic-electric-works/AQV257AX/646155

    • 200V

    • 250mA

Add Hall Effect Current Sensor [Too complex to do in small time frame]

• Remove entire middle section with Hall Effect Current Sensor

  • Must connect to IN+ and IN-

    • Unsure if AND gate and MOSFETs need to be changed

Links

https://www.bristolwatch.com/hall_effect/ac_hall_effect.htmhttps://electronics.stackexchange.com/questions/338601/hall-effect-sensor-for-current-sensing-in-high-dc-voltage

Part search

• Check ratings (Current, voltage, sensitivity)

  • Current

  • Voltage

    • 120V?

  • Sensitivity [Check]

    • 0.806mV/A?

      • 3.3/2^12 (12bit ADC)

      • https://www.st.com/content/ccc/resource/technical/document/datasheet/cd/46/43/83/22/d3/40/c8/DM00090510.pdf/files/DM00090510.pdf/jcr:content/translations/en.DM00090510.pdf

https://www.globalspec.com/learnmore/sensors_transducers_detectors/electrical_electromagnetic_sensing/electrical_current_sensors

• https://www.ti.com/lit/an/slia086a/slia086a.pdf?ts=1647014926239

• Part list

  • https://www.digikey.ca/en/products/detail/allegro-microsystems/ACS756SCB-050B-PFF-T/5400760

    • 50A

    • No Stock :/

  • https://www.digikey.ca/en/products/detail/lem-usa-inc/HO-8-NP-0000/4331974

    • 8A

    • No Sensitivity

  • https://www.digikey.ca/en/products/detail/tamura/L08P100D15/529421

    • 100A

    • No Sensitivity

  • https://www.digikey.ca/en/products/detail/tamura/L01Z200S05/529408

    • 200A

    • No Sensitivity

  • https://www.digikey.ca/en/products/detail/texas-instruments/TMCS1101A1BQDRQ1/14634037

    • 45A

    • 50 mV/A

  • https://www.digikey.ca/en/products/detail/texas-instruments/TMCS1100A4QDR/12696002

    • A?

    • 400 mV/A

Simplify Isolated DCDC

• U4

  • Original

    • Charge pump switch regulator

    • https://www.digikey.ca/en/products/detail/microchip-technology/tc7662beoa713/418710

  • New Change

    • https://electronics.stackexchange.com/questions/266187/efficient-alternative-to-a-charge-pump-for-stepping-up-a-3v-supply-to-3-3v

      • Use synchronous boost converter?

        • https://www.digikey.ca/en/products/detail/texas-instruments/tps61020drcrg4/1672113

• U5

  • Original

    • Optoisolator

    • https://www.digikey.ca/en/products/detail/broadcom-limited/HCPL-0211-000E/825261?s=N4IgTCBcDaIBIGEAKAZAtABjARm5jGAoiALoC%2BQA

  • New Change

    • https://electronics.stackexchange.com/questions/582157/alternative-to-optocoupler-in-circuit-design

    • https://electronics.stackexchange.com/questions/389934/automotive-signal-isolation-alternatives-to-optocouplers

      • Inductive coupler

      • RF coupler

      • Capacitive coupler

        • https://www.digikey.ca/en/products/detail/texas-instruments/iso7740fdw/6148234

• U9

  • Original

    • DC DC Converter

    • https://www.digikey.ca/en/products/detail/xp-power/ISE1212A-TR/5320900?s=N4IgTCBcDaIIwBYDsAGAtGAnAVnXNAcgCIgC6AvkA

  • New Change

    • https://forum.allaboutcircuits.com/threads/dc-dc-converter-alternatives.23964/

    • https://electronics.stackexchange.com/questions/543252/dc-to-dc-converter-options

      • Also use boost converter?

        • https://www.digikey.ca/en/products/detail/texas-instruments/tps61020drcrg4/1672113

• Smaller changes

  • Removing:

    • Fan control

      • Remove fan connector

      • Remove entire fan control sheet

    • Thermistor

      • Remove thermistor connector

      • Remove entire thermistor sheet

  • Add jumpers near AND gate to skip it

...